Maths practice for 14 year olds - page 211 of 371
Number of problems found: 7411
- Three numbers
We have three different non-zero digits. We will create all three-digit numbers from them and use all three figures in each. We add all the made numbers and get the sum of 1554. What were the numbers? - Percentage 7900
The purchase price is 11.50 per piece. The selling price is 14.50. What is the percentage return when selling 950 pieces and 1200 pieces? - Average height
The average height of all pupils is 162 cm. The class teacher's height is 178 cm. The average height of all (teacher and all pupils) is 163 cm. Calculate the number of pupils in the class. - Percentage 7896
I am selling 150 pieces for the amount of 2350 CZK. The customer is offered the same number of pieces for 1700 CZK. By what percentage is my offer higher? - Ice layer
A 2 cm thick layer of ice formed in the circular water tank. What part of the tank's water (answer in percent) froze if the tank has a diameter of 20 m and a depth of 1.5 m? - Must-have 7893
If we want to make a prism with a wooden base with a 5 cm side of a wooden bar, what is the bar's smallest diameter? - Transport 7890
The sheet metal keg for oil transport has the shape of a cylinder with a volume of 62.8 liters and a height of 0.5 m. How many kg of paint do we need to paint if we need 1 kg of paint for 1.5 m²? - KLM triangle
Find the length of the sides of the triangle KLM if m = 5cm height to m = 4.5 cm and size MKL angle is 70 degrees. - Balloon and bridge
From the balloon, which is 92 m above the bridge, one end of the bridge is seen at a depth angle of 37° and the second end at a depth angle of 30° 30 '. Calculate the length of the bridge. - Foot area
Which animal will leave a deeper footstep: an elephant weighing 5 tons with a total foot area of 0.5 square meters, or a gazelle weighing 10 kg and a foot area of 50 cm square? - Society
A senior citizens' association has a total of three hobby clubs - chess, hiking, and cooking. Chess - number of members 15, cooking 45, hiking: the share of club members from all clubs: 60%. Number of members: women 84. Each member of the association atte - Walking
Of the 450 students at the school, 432 walks to school. What percentage is this? - Company and employees
There are 370 employees in the company - women are 15% less than men. How many men work in the company? - Perimeter 7882
The diagonals of the diamond are 2.4 dm and 1.8 dm long. What is the perimeter of this diamond? - Embankment 7879
An embankment 7.5 m high should be built on the horizontal plane. The width of the upper surface of the embankment is 2.9 m, and the slope is 35 °. What will be the lower width of the embankment? - Two-fifths 7878
The cyclist drives a 240 km long route in 3 days. On the first day, go half of the entire route. The second day passed two-fifths of the rest of the way. What percentage of the cyclist completed the whole way on the third day? - Expectations 7877 The company expected to win 120 orders but eventually managed to win 180 orders. By what percentage did the company exceed its expectations?
- Lemonade
In January, 2 liters of lemonade were sold for CZK 24, while in February, 2.5 liters of lemonade were sold at the same price. How much percent was 1 liter of lemonade cheaper in February than in January? - Described 7872
In the KLM isosceles triangle, the KL base is 24 cm long, and the arm measures 15 cm. What is the radius of the circle described by this triangle? - Average temperature
The average temperature from Monday to Sunday was 40.5°F, and the average temperature from Monday to Saturday was 42.8°F. What was the temperature on Sunday?
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